I don't do much in terms of modifications to models since I'm always short on time in getting them ready for the table. I made an exception in the case of the Centurion's spear. I wanted to replace the spear in the metal kit with the one from the plastic warjack kit. As the pictures will attest, I was largely successful.
Who doesn't want a bigger spear? The weapon on the metal version of Cygnar's Centurion warjack is ridiculously tiny (seen in the photo below, right side). It's a toothpick. The version from the plastic kit - now we're talking. To quote Crocodile Dundee - "That's not a Piston Spear, THIS is a Piston Spear."